Source imaging of drums in the APNEA system

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Description

The APNea System is a neutron assay device utilizing both a passive mode and a differential-dieaway active mode. The total detection efficiency is not spatially uniform, even for an empty chamber, and a drum matrix in the chamber can severely distort this response. In order to achieve a response which is independent of the way the source material is distributed in a drum, an imaging procedure has been developed which treats the drum as a number of virtual (sub)volumes. Since each virtual volume of source material is weighted with the appropriate instrument parameters (detection efficiency and thermal flux), the final ... continued below

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22 p.

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Hensley, D. December 31, 1995.

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Description

The APNea System is a neutron assay device utilizing both a passive mode and a differential-dieaway active mode. The total detection efficiency is not spatially uniform, even for an empty chamber, and a drum matrix in the chamber can severely distort this response. In order to achieve a response which is independent of the way the source material is distributed in a drum, an imaging procedure has been developed which treats the drum as a number of virtual (sub)volumes. Since each virtual volume of source material is weighted with the appropriate instrument parameters (detection efficiency and thermal flux), the final assay result is essentially independent of the actual distribution of the source material throughout the drum and its matrix.

Physical Description

22 p.

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INIS; OSTI as DE96005981

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  • 4. nondestructive assay and nondestructive examination waste characterization conference, Salt Lake City, UT (United States), 24-26 Oct 1995

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  • Other: DE96005981
  • Report No.: CONF-951091--10
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 200664
  • Archival Resource Key: ark:/67531/metadc671633

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  • December 31, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Jan. 22, 2016, 4:40 p.m.

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Hensley, D. Source imaging of drums in the APNEA system, article, December 31, 1995; Tennessee. (digital.library.unt.edu/ark:/67531/metadc671633/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.